Here's the situation. You're driving down the highway, cruising around 80mph. You really got to go hit the bathroom, so you let off the gas, clutch still in. The engine is still around 4k RPMs or so.
Now the question: Are you using the same amount of gas as you would if if you had pulled the car out of gear?
Logic would dictate that since you are still at a higher RPM, it takes more fuel to run the engine at that high a revolution, but since the momentum of the car is also keeping the engine turning, not as much fuel as if you had clutched out.
However: per http://forums.vwvortex.com/zerothread?id=606610, if the gas pedal indicates the relative flowrate into the engine, you are using as much gasoline as if you were idling.
What do you guys think?
Fae
Now the question: Are you using the same amount of gas as you would if if you had pulled the car out of gear?
Logic would dictate that since you are still at a higher RPM, it takes more fuel to run the engine at that high a revolution, but since the momentum of the car is also keeping the engine turning, not as much fuel as if you had clutched out.
However: per http://forums.vwvortex.com/zerothread?id=606610, if the gas pedal indicates the relative flowrate into the engine, you are using as much gasoline as if you were idling.
What do you guys think?
Fae
